/* Copyright  2009
   @Author
   Richard Changde Yin            e-mail yinchangde@hotmail.com

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
   
/**
 * @filename: function/bit.cc
 */ 
#include <server_includes.h>
#include CSTDINT_H
#include <function/bit.h>

int64_t Item_func_bit_neg::val_int()
{
  assert(fixed == 1);
  uint64_t res= (uint64_t) args[0]->val_int();
  if ((null_value=args[0]->null_value))
        return 0;
  return ~res;
}

int64_t Item_func_bit_xor::val_int()
{
  assert(fixed == 1);
  uint64_t arg1 = (uint64_t) args[0]->val_int();
  uint64_t arg2 = (uint64_t) args[1]->val_int();
  /*
  if eithor of argx is null value, we return  ZERO.
  */
  if ((null_value= (args[0]->null_value || args[1]->null_value)))
        return 0;
  return (int64_t) (arg1 ^ arg2);
}


